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    STUDIA MATHEMATICA - Issue no. 3 / 2020  
         
  Article:   NOTES ON THE NORM OF PRE-SCHWARZIAN DERIVATIVES OF CERTAIN ANALYTIC FUNCTIONS.

Authors:  RAHIM KARGAR.
 
       
         
  Abstract:  
DOI: 10.24193/subbmath.2020.3.04

Published Online: 2020-09-15
Published Print: 2020-09-15
pp. 357-363
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ABSTRACT: In this paper, we obtain sharp bounds for the norm of pre--Schwarzian derivatives of certain analytic functions. Initially this problem was handled by H. Rahmatan, Sh. Najafzadeh and A. Ebadian [Stud Univ Babec{s}--Bolyai Math {f61}(2): 155--162, 2016]. We pointed out that their proofs are incorrect and present correct proofs.

Key words: Analytic; Univalent; Locally univalent; Subordination; Pre--Schwarzian norm.
 
         
     
         
         
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